JPS61188207U - - Google Patents
Info
- Publication number
- JPS61188207U JPS61188207U JP7172085U JP7172085U JPS61188207U JP S61188207 U JPS61188207 U JP S61188207U JP 7172085 U JP7172085 U JP 7172085U JP 7172085 U JP7172085 U JP 7172085U JP S61188207 U JPS61188207 U JP S61188207U
- Authority
- JP
- Japan
- Prior art keywords
- louver
- louver body
- emitted
- angle
- plane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Elements Other Than Lenses (AREA)
Description
第１図は本考案の実施例１を示す断面図、第２
図は同上の配置状態を示す斜視図、第３図および
第４図は同上の動作説明図、第５図は同上のルー
バ体の下端縁に散乱部を形成した例を示す部分斜
視図、第６図および第７図は本考案の実施例２の
動作説明図、第８図および第９図は本考案の実施
例３の動作説明図、第１０図は従来例を示す断面
図、第１１図は同上の拡大断面図である。
１ａ，１ｂ，１ｃはルーバ体、２は対称面、３
は反射面、３ａは放物面、３ｂは球面、３ｃは平
面である。
Fig. 1 is a sectional view showing the first embodiment of the present invention;
3 and 4 are explanatory views of the operation of the louver body, and FIG. 5 is a partial perspective view showing an example in which a scattering portion is formed on the lower edge of the louver body. 6 and 7 are explanatory diagrams of the operation of the second embodiment of the present invention, FIGS. 8 and 9 are explanatory diagrams of the operation of the third embodiment of the present invention, FIG. 10 is a sectional view showing the conventional example, and FIG. The figure is an enlarged sectional view of the same as above. 1a, 1b, 1c are louver bodies, 2 is a symmetry plane, 3
is a reflective surface, 3a is a paraboloid, 3b is a spherical surface, and 3c is a plane.
Claims (1)
つて上下に開放された筒状に形成されその内周面
が反射面となつたルーパ体を有し、対称面を挟む
ルーバ体の一方の下端と他方の上端とを結ぶ直線
がルーバ体の下端面に対してなす最小角度をαと
し、光源から放射され反射面で反射された光線が
ルーバ体の下端面に対してなす角度をβとし、対
称面を挟むルーバ体の一方の下端部から放射され
他方の反射面で１回以上反射されてルーバ体の下
端から放射される光線がルーバ体の下端面に対し
てなす角度をγとするとき、α≦βかつα≦γと
なる反射面が形成された照明器具用ルーバ。 It has a louver body that is bilaterally symmetrical with the vertical plane as the plane of symmetry, and is formed into a cylindrical shape that is open at the top and bottom, and whose inner peripheral surface is a reflective surface. Let α be the minimum angle that the straight line connecting the lower end and the other upper end makes with the lower end surface of the louver body, and let β be the angle that the light ray emitted from the light source and reflected on the reflective surface makes with the lower end surface of the louver body. , Let γ be the angle that a ray of light that is emitted from the lower end of one of the louver bodies sandwiching the plane of symmetry, is reflected one or more times on the other reflecting surface, and is emitted from the lower end of the louver body, with respect to the lower end face of the louver body. A louver for lighting equipment is formed with a reflective surface that satisfies α≦β and α≦γ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985071720U JPS6345689Y2 (en) | 1985-05-15 | 1985-05-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985071720U JPS6345689Y2 (en) | 1985-05-15 | 1985-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61188207U true JPS61188207U (en) | 1986-11-22 |
| JPS6345689Y2 JPS6345689Y2 (en) | 1988-11-28 |
Family
ID=30609467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985071720U Expired JPS6345689Y2 (en) | 1985-05-15 | 1985-05-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6345689Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02262207A (en) * | 1989-03-31 | 1990-10-25 | Toshiba Lighting & Technol Corp | Louver for lighting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5761206A (en) * | 1980-09-30 | 1982-04-13 | Mitsubishi Electric Corp | Illuminator |
-
1985
- 1985-05-15 JP JP1985071720U patent/JPS6345689Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5761206A (en) * | 1980-09-30 | 1982-04-13 | Mitsubishi Electric Corp | Illuminator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02262207A (en) * | 1989-03-31 | 1990-10-25 | Toshiba Lighting & Technol Corp | Louver for lighting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6345689Y2 (en) | 1988-11-28 |